Formation pressure calculation method based on short-term production data

Abstract

The invention relates to the technical field of oil and gas field development, in particular to a formation pressure calculation method based on short-term production data. The formation pressure calculation method based on short-term production data comprises the steps that formation pressure and cumulative gas of any two production points with the quasi-stable state stage production time interval smaller than one month are selected, in combination with the relation between the deviation coefficient under the original formation pressure and the original condition, the deviation coefficient with the pressure larger than or equal to 13 MPa and the pressure, the formation pressure calculation method based on any production point is built, the cumulative gas of any production point is substituted into the method, and the corresponding formation pressure is calculated. Relative to the field measurement method and the matter balance method, the economic losses brought by well closing and test can be reduced, relative to a flowing matter balance method, approximate calculation is avoided, the result meets the reality, the related parameters of two production points are only needed, and the calculation process is simpler.

Description

technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a formation pressure calculation method based on short-term production data. Background technique [0002] Formation pressure, as the driving force of gas reservoir development, determines the gas production rate and economic benefits of gas wells. Keeping track of changes in formation pressure is crucial to ensuring the production increase, stable production and later development adjustment of gas wells and gas reservoirs. Existing formation pressure acquisition technologies include two categories: actual measurement method and calculation method: the actual measurement method is the most accurate but requires a long time to shut down the well, and shutting down the well for a long time will bring economic losses to the gas wells with production tasks; the calculation method Simple and fast, material balance method and flowing material balance method are th...

AI Technical Summary

Problems solved by technology

In the actual application process, the formation pressure at the parallel starting point of the curve cannot be obtained, so the original formation pressure is often used instead of the formation pressure at the parallel starting point of the curve for approximate calculation, and there is a large error between the calculated formation pressure and the actual formation pressure

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